[ 31.038239] BUG: Bad rss-counter state mm:000000003a541d74 type:MM_FILEPAGES val:33 [ 31.039311] BUG: Bad rss-counter state mm:000000003a541d74 type:MM_ANONPAGES val:22 [ 31.203388] ================================================================== [ 31.204298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.205226] Read of size 8 at addr ffff88800e0a84e0 by task sshd/219 [ 31.206095] [ 31.206310] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.207185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.208174] Call Trace: [ 31.208499] [ 31.208788] dump_stack_lvl+0x91/0xf0 [ 31.209286] print_report+0xcc/0x620 [ 31.209787] ? __virt_addr_valid+0x102/0x340 [ 31.210340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.210973] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.211598] kasan_report+0xbe/0xf0 [ 31.212074] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212695] vma_interval_tree_remove+0xc75/0xec0 [ 31.213292] vma_prepare+0xc54/0x11a0 [ 31.213770] __split_vma+0x5af/0x950 [ 31.214239] ? __pfx___split_vma+0x10/0x10 [ 31.214775] ? find_held_lock+0x2c/0x110 [ 31.215300] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.215871] ? lock_is_held_type+0x9f/0x120 [ 31.216404] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.217011] ? mtree_range_walk+0x632/0x900 [ 31.217558] ? mas_walk+0x5c7/0x7c0 [ 31.218030] do_vmi_munmap+0x1f1/0x2b0 [ 31.218533] mmap_region+0x1f9/0x2660 [ 31.219032] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219544] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220259] ? __pfx_lock_acquire+0x10/0x10 [ 31.220805] ? __pfx_mmap_region+0x10/0x10 [ 31.221329] ? security_mmap_addr+0x7d/0xa0 [ 31.221875] ? get_unmapped_area+0x1f5/0x3f0 [ 31.222427] do_mmap+0x854/0xf00 [ 31.222902] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.223397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.223966] ksys_mmap_pgoff+0x3af/0x500 [ 31.224482] do_syscall_64+0x3f/0x90 [ 31.224960] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.225610] RIP: 0033:0x7f06dccb6d82 [ 31.226069] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.228200] RSP: 002b:00007ffef14d3d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.229102] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06dccb6d82 [ 31.229946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06dc0f0000 [ 31.230803] RBP: 00007f06dc0f0000 R08: 0000000000000009 R09: 0000000000001000 [ 31.231651] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c1a08bd90 [ 31.232489] R13: 00007ffef14d3d80 R14: 00007ffef14d3db0 R15: 00007ffef14d4110 [ 31.233342] [ 31.233644] [ 31.233858] Allocated by task 211: [ 31.234303] kasan_save_stack+0x22/0x50 [ 31.234855] kasan_set_track+0x25/0x30 [ 31.235353] __kasan_slab_alloc+0x59/0x70 [ 31.235873] kmem_cache_alloc+0x16b/0x370 [ 31.236393] vm_area_dup+0x20/0x160 [ 31.236850] __split_vma+0x170/0x950 [ 31.237320] split_vma+0xc6/0x110 [ 31.237767] mprotect_fixup+0x8d2/0xb30 [ 31.238273] do_mprotect_pkey+0x87e/0xd40 [ 31.238815] __x64_sys_mprotect+0x78/0xc0 [ 31.239343] do_syscall_64+0x3f/0x90 [ 31.239815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.240454] [ 31.240673] Freed by task 211: [ 31.241066] kasan_save_stack+0x22/0x50 [ 31.241577] kasan_set_track+0x25/0x30 [ 31.242073] kasan_save_free_info+0x2b/0x50 [ 31.242625] __kasan_slab_free+0x10a/0x190 [ 31.243158] kmem_cache_free+0x10d/0x4d0 [ 31.243674] rcu_core+0x8c8/0x2860 [ 31.244113] __do_softirq+0x1b7/0x7d4 [ 31.244596] [ 31.244812] Last potentially related work creation: [ 31.245391] kasan_save_stack+0x22/0x50 [ 31.245905] __kasan_record_aux_stack+0x8e/0xa0 [ 31.246482] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.247129] remove_vma+0x139/0x170 [ 31.247589] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.248146] do_vmi_munmap+0x1f1/0x2b0 [ 31.248630] __vm_munmap+0x138/0x3a0 [ 31.249097] __x64_sys_munmap+0x59/0x80 [ 31.249600] do_syscall_64+0x3f/0x90 [ 31.250088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.250743] [ 31.250961] The buggy address belongs to the object at ffff88800e0a8488 [ 31.250961] which belongs to the cache vm_area_struct of size 168 [ 31.252444] The buggy address is located 88 bytes inside of [ 31.252444] freed 168-byte region [ffff88800e0a8488, ffff88800e0a8530) [ 31.253871] [ 31.254085] The buggy address belongs to the physical page: [ 31.254753] page:00000000acbc87eb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0a8 [ 31.255835] memcg:ffff888013f10901 [ 31.256288] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.257019] page_type: 0xffffffff() [ 31.257479] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aaf00 dead000000000005 [ 31.258392] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f10901 [ 31.259318] page dumped because: kasan: bad access detected [ 31.259985] [ 31.260199] Memory state around the buggy address: [ 31.260776] ffff88800e0a8380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.261632] ffff88800e0a8400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.262503] >ffff88800e0a8480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.263401] ^ [ 31.264212] ffff88800e0a8500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.265101] ffff88800e0a8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.266001] ================================================================== [ 31.267126] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.254545] BUG: Bad rss-counter state mm:000000003243afe8 type:MM_FILEPAGES val:33 [ 33.255565] BUG: Bad rss-counter state mm:000000003243afe8 type:MM_ANONPAGES val:22 [ 33.707724] BUG: Bad rss-counter state mm:000000003c7b97fc type:MM_FILEPAGES val:33 [ 33.708720] BUG: Bad rss-counter state mm:000000003c7b97fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56533' (ECDSA) to the list of known hosts. 2023/06/20 15:15:25 fuzzer started 2023/06/20 15:15:26 dialing manager at localhost:36067 2023/06/20 15:15:26 checking machine... 2023/06/20 15:15:26 checking revisions... [ 34.431176] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:15:26 testing simple program... [ 34.475029] cgroup: Unknown subsys name 'net' [ 34.514818] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:15:25 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=ffffffff81f4d5f8 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800fc07c38 RSP=ffff88800fc07a50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff888009b9b808 R13=ffff88800fc07c3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c0250 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2f1cc3f900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f2f1d1f6618 CR3=000000000e886000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7ecb942f70 CR3=000000000d466000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=c76275a6073957bd27469d49449660b1 XMM02=2c67c8bc2e329bc3000000000011ae00 XMM03=fb795ef6d657705600000000001217a0 XMM04=4e46e1229766988900000000000ae988 XMM05=dfcdbad4f1609c370000000000131358 XMM06=12e7259caf4857910000000000130530 XMM07=e042d86d42eb936e0000000000121a20 XMM08=30df8cb280254ac4000000000011ae60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000